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Enthalpies of Solution for VOSO4 center dot 2.76H(2)O(s) in Water and in Aqueous H2SO4
Liu Jianguo; Qin Ye; Yan Chuanwei
Corresponding AuthorLiu Jianguo()
2010-04-14
Source PublicationACTA CHIMICA SINICA
ISSN0567-7351
Volume68Issue:7Pages:722-726
AbstractThe molal enthalpies of solution of VOSO4 center dot 2.76H(2)O(s) with various molalities in water and in aqueous sulfuric acid (0.5 mol.kg(-1)) Delta H-s(m), were measured by a solution-reaction isoperibol calorimeter at 298.15 K. The value of -Delta H-s(m) in aqueous sulfuric acid was lower than that in water, which shows that energy state of VOSO4 in aqueous H2SO4 was higher than that in pure water. An improved Archer's method was put forward in terms of ionic association equilibrium of VOSO4 and second dissociation equilibrium of H2SO4. Using the improved method, the standard molal enthalpies of solution Delta H-s(m)circle minus = 29.18 kJ.mol(-1) in pure water and Delta H-s(m)circle minus = -25.79 kJ.mol(-1) in aqueous sulfuric acid were obtained, respectively. According to calculation, the molality of VO2+ was larger in VOSO4-H2SO4 mixed solution than that in water.
Keywordvanadium redox flow battery enthalpy of solution vanadyl sulfate sulfuric acid
Indexed BySCI
Language英语
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
WOS IDWOS:000277418700020
PublisherSCIENCE PRESS
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/102210
Collection中国科学院金属研究所
Corresponding AuthorLiu Jianguo
AffiliationChinese Acad Sci, Inst Met Res, State Key Lab Corros & Protect, Shenyang 110016, Peoples R China
Recommended Citation
GB/T 7714
Liu Jianguo,Qin Ye,Yan Chuanwei. Enthalpies of Solution for VOSO4 center dot 2.76H(2)O(s) in Water and in Aqueous H2SO4[J]. ACTA CHIMICA SINICA,2010,68(7):722-726.
APA Liu Jianguo,Qin Ye,&Yan Chuanwei.(2010).Enthalpies of Solution for VOSO4 center dot 2.76H(2)O(s) in Water and in Aqueous H2SO4.ACTA CHIMICA SINICA,68(7),722-726.
MLA Liu Jianguo,et al."Enthalpies of Solution for VOSO4 center dot 2.76H(2)O(s) in Water and in Aqueous H2SO4".ACTA CHIMICA SINICA 68.7(2010):722-726.
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